Use a double-angle identity to find the exact value of the expression.1 - 2 sin2 
A. - 
B. 
C. - 
D. 
Answer: D
Mathematics
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Find the derivative.y = 18x sin 19x
A. 342x cos 19x + 18 sin 19x B. 342x cos 19x + sin 19x C. 342x cos 18x + 18 sin 19x D. -342x cos 19x + 18 sin 19x
Mathematics
Use Cramer's Rule (if applicable) to solve the system of equations.
A. {(-2, 2)} B. {(1, 2)} C. {(-1, 1)} D. ?
Mathematics
Evaluate the expression.log7.6 281
A. 36.9737 B. 2.7801 C. 2.4487 D. 0.3597
Mathematics
Simplify. Assume that no radicands were formed by raising negative quantities to even powers.
A. 
B. 
C. 21
D. 
Mathematics